English verb conjugation
MUST FORM

Regular verb: form - formed - formed

Affirmation

Simple form	V-ing form
I must form you must form he must form we must form you must form they must form	I must be forming you must be forming he must be forming we must be forming you must be forming they must be forming
Perfect	V-ing perfect
I must have formed you must have formed he must have formed we must have formed you must have formed they must have formed	I must have been forming you must have been forming he must have been forming we must have been forming you must have been forming they must have been forming

Negation

Simple form	V-ing form
I must not form you must not form he must not form we must not form you must not form they must not form	I must not be forming you must not be forming he must not be forming we must not be forming you must not be forming they must not be forming
Perfect	V-ing perfect
I must not have formed you must not have formed he must not have formed we must not have formed you must not have formed they must not have formed	I must not have been forming you must not have been forming he must not have been forming we must not have been forming you must not have been forming they must not have been forming

Interrogative form

Simple form	V-ing form
must I form? must you form? must he form? must we form? must you form? must they form?	must I be forming? must you be forming? must he be forming? must we be forming? must you be forming? must they be forming?
Perfect	V-ing perfect
must I have formed? must you have formed? must he have formed? must we have formed? must you have formed? must they have formed?	must I have been forming? must you have been forming? must he have been forming? must we have been forming? must you have been forming? must they have been forming?

Interro-negative form

Simple form	V-ing form
must I not form? must you not form? must he not form? must we not form? must you not form? must they not form?	must I not be forming? must you not be forming? must he not be forming? must we not be forming? must you not be forming? must they not be forming?
Perfect	V-ing perfect
must I not have formed? must you not have formed? must he not have formed? must we not have formed? must you not have formed? must they not have formed?	must I not have been forming? must you not have been forming? must he not have been forming? must we not have been forming? must you not have been forming? must they not have been forming?